BOGOTA - FARC guerrillas left at least six small explosive devices dotted around Bogota on Wednesday -- three of which detonated -- to mark 50 years of the Marxist rebellion, the mayor of the Colombian capital said.

There were no injuries, Bogota Mayor Gustavo Petro said, adding that the devices were accompanied by Revolutionary Armed Forces of Colombia (FARC) propaganda.

The government of Juan Manuel Santos has been in talks with the FARC since November 2012 in an attempt to end Latin America's longest guerrilla war.

"The FARC should reconsider this type of action in view of the peace process," said Petro.

The conflict, with its violent cocktail of rebels, paramilitary militia and criminal gangs, has left more than 220,000 people dead and forced five million to leave their homes over the past half century.

Founded in 1964, the FARC boasts about 8,000 fighters.

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